Home / 429,055.22-643,686.89-129,517.91

Finding the Fourth Proportional to 429,055.22, 643,686.89 and 129,517.91

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Solution

The fourth proportional to 429,055.22, 643,686.89 and 129,517.91 is: 194,308.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,055.22 : 643,686.89 = 129,517.91 : x
  2. Step 2: Convert to fraction form
    429,055.22/643,686.89 = 129,517.91/x
  3. Step 3: Cross multiply
    429,055.22x = 643,686.89 × 129,517.91
  4. Step 4: Simplify right side
    429,055.22x = 83,368,979,235.00
  5. Step 5: Solve for x
    x = 83,368,979,235.00/429,055.22
  6. Step 6: Final answer
    x = 194,308.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.